Separable knob lock



y SEPARABLE KNOB LOCK Filed May 17,1928 2 Sheets-Sheet 1 Jan, 39 1933. J, H, SHAW 1,892,799

SEPARABLE KNOB LOCK Filed May 17. 1928 2 Sheets-Sheet 2 Patented Jan. 3, 1933 JOHN H. SHAW, OI NEW HAVEN, CONNECTICUT, ASSIGNOR T SABGENT OOIPANY,

on NEWy HAVEN, CONNECTICUT SEPABABLE KNOB LOCK Application led Iay 17,

My invention relates to separable knob locks, and more particularly to such locks in which the disassemblin of the lock parts is under the control of a ey.

It is highly desirable in certain instances to provide cylinder, or other lock mechanisms, which may be readily disassembled from a lock case or the like, in order that the combination of the lock may be changed, or for other purposes. Locks ofthis type, as heretofore known, have generally been provided with secondary locking systems which secure, for example, a key plug and pin tumbler mechanism in the lock case, the secondary locking system being under the control of a key. Each in tumbler of the previously known locks has been provided with a plurality of breaks or shears, one set of shears being brought into alignment with the surface of the key plug by a suitable key during the normal operation of the lock, and a second or different set being brought into alignment in the secondary locking system by another key to permit the operation of this system and the withdrawal of the lock mechanism from its case. lIt is, in general, an object of the present invention to provide key controlled means for securing a locking mechanism in a case which is of simpler construction than the usual lock of this character andless apt to get out of order Another object of the invention is to pro` vide a detachable lock mechanism, the detachment of which is key controlled and in which the in tumblers, or such other means as is use to ensure that the lock may not be operated except by a proper key, are adjusted in precisel the same manner when the lock is being etached as they are during the normal operation of the lock thus obviating the necessit for any special forms of pin tumbler or other mechanisms as heretofore have been necessary in locks of this character.

As still another and general object of my invention, propose to provide a detachable 1928. Serial No. 278,545.

lock mechanism in which the detachment of the mechanism is controlled by suitable secondary locking means carried within the lock case which while out of the path of the ordinary key, may be engaged by a special key to permit thedetachment of the lock mechamsm.

In one of its more specilic aspects, the invention contemplates a detachable door lock which is in the form of a cylinder lock carrled within the handle of a door, or `the like, and provided with suitable connecting means extending throu h the shank of the handle into the main boy of the lock which is usually mortised into the door.

A further object of the invention is to provide a detachable door lock of the latter type in which the handle of the door containing the lock is made up out of one or more separable parts which, while ordinarily locked against relative movement to the main body of the handle, may be detached therefrom upon the insertion of a proper key in the lock, whereupon the lock may be freely withdrawn from the interior of the handle.

A still further object of the invention resides in an improved form of lock mechanism of the above type in which there are no exposed parts which may be tampered with by one seeking to force the lock.

To these and other ends, the invention consists in the novel features and combination of parts to be hereinafter described and claimed.-

In the drawings,

Fig. lis a view showing a portion of a door, having a lock in accordance with my invention, mounted thereon;

Fig. 2 is a view along line 2-2 of Fig. l; Fig. 3 is a sectional view along line 3-3 Fig. l, but on an enlarged scale; Fig. 4 is a sectional view along line 4-4 of Fig. 2, but on an enlarged scale;

Fig. 5 is a sectional view alon line 5 5 of Fig. 1, but on an enlarged sca e; and

Fig. 6 is a sectional view along line 6--6 of Fig. 8.

will now describe my invention in connection with the preferred embodiment thereof shown in the drawings, wherein my im proved form of separable knob lock is shown in the form of a cylinder lock carried in the handle of a. door, although it will be understood as the description of the invention proceeds that in certain aspects the invention is not limited to use in the handle of a door or the like, but has a Wider and more general scope.

Referring then to the drawings, the reference numeral 7 indicates in general a door having mortised therein a. lock\ case 8, provided with a pivoted latch bolt 9, to which is connected a stem 10, provided at an inner end with laterally extending parts 11 and 12 having thereon lugs 13 and 14 which may be engaged by rollbacks 15, 16 and 17, in a manner to be pointed out hereinafter, to retract the latch bolt 9, while the latter is normallyurgedinto protracted position by means of compression spring 18 received on and surrounding stem 10, one end of spring 18 being in contact with latch 9 and the opposite end in Contact with transverse part 19 of case 8.

On either side of door 7 are escutcheon plates 2O and 21, in which are mounted, preferably in a permanent manner, collars 22 and 23 having tightly received therein a tubular element 24, which is secured against rotation in and extends through lock case 8 and outwardly through collars 22 and 28. Received within tube 24 at one end thereof is a shank 25 of knob 26, while in the opposite end of tube 24 is a shank 27 of knob 28, shank 27 heing provided with slots 29 and 30, in which are received talons 81 and 82 of rollback 15, while shank 25 is provided with similar slots for the reception of rollback 17.

0n the outer end of shank 27 is a disk-like flanged end 38, provided on its periphery with threads 34, received within a similarly threaded portion 35 of handle 28, relative movement between shank 27 and handle 28 being prevented by screws 36 which are received within suitable openings, partly in disk-like flange 33 and handle 28. Handle 28 is hollow and has mounted therein cylinder lock 37 provided with the usual key plug y 38 having thensual key opening 89 and a plurality of transverse openings 40, which together with the similar number of cavities 41 in cylinder case 42 contain the pin tumbler sections 48 and springs 44. One end of key plug 38 extends outwardly through a suitable opening in handle 28, while at its opposite end the key plug is secured by means of pin 45 to thimble 46, having received in a square opening therein a square rod 47 which passes through a similarly shaped opening in rollback 16 and into an opening 48 in handle 26. Key plug 38 is secured against movement in Legame an axial direction in one direction by means of flanged portion 49 of thimble 46 and in the opposite direction by means of flanged end 5G which bears against casing 42.

In order to dog rollback 16 against movement and thereby to prevent the latch 9 from being withdrawn by the use of handle 28, a pivoted lever 51 is provided in the outer wall 52 of lock case 8, lever 51 being connected by stem 53 with locking pin 54 which is supported in a transverse part 55 of lock case 8 and adapted to enter openings 59 and 60 of tube 24 and shank 27, respectively. In order to cover screws 36 and preventtampering therewith, a shroud 61 is provided extending from recess 62 in the outer end of tube 24 to the adjacent end of handle 28.

The operation of the lock mechanism described above will be readily understood from.

the foregoing description and may be briefly described as follows: The rollbacks 15, 16 and 17 are capable of independentrotary movement and the operation of any one of the rollbacks will bring one of the talons thereon into Contact with either lug 13 or 14 depending upon which direction the rollbacks are rotated, the engagement of the talons with the lugs moving stem 10 inwardly against the compression spring 18 and withdrawing the latch bolt 9 from the keeper plate in the adjacent jamb of the door. The handle 26, which will be normally on the inside of the door, through the engagement of its shank 25 with rollback 17, is free to cause the withdrawal of latch 9 at all times, while handle 28 through the connection of its shank 27 with rollback 15 is free to cause the withdrawal of latch bolt 9 at all times except when the rollback 15 is dogged against movement by locking the pin 54 when the latter has been inserted into openings 59 and 60 by the actuation of lever 51, whereupon the handle 28 is locked against movement. in this condition of the lock mechanism, the latch bolt 9 may only be actuated from the outside of the door by means of a proper key inserted into the cylinder lock mechanism.

Upon the insertion of a proper key in key plug 88, the breaks or shears of pin tumblers 43 are brought into alignment with the outer surface of key plug 88, whereupon the latter may be rotated by the key. Upon rotation of key plug 38 and thereby thimble 46 and rod 47, rollback 16 is rotated, causing the withdrawal of latch bolt 9.

Up 'to this point in the description of my invention, l have been concerned with those features of the lock mechanism which enter into the normal operation of the lock. 1t is highly desirable, however, to provide a lock mechanism which may be readily disassembied to change the combination of the lock, and for other purposes, and 1 will now describe the features of my improved form of separable knob lock which provide a suitable means to that Vendo Referring again to the drawings, it will be seen that the handle 28 comprises a main 5 body portion 63 and a separable face plate 64 which is provided on its periphery with interrupted threads 65, engaging similarly interrupted threads 66 in handle body 63, face plate 64 being normally vlocked against 10 rotary movement relative to the handle by means of plunger 67 in lock case 42, plunger 67 being urged towards face plate 64 by means of spring 68, plate 64 being provided with an opening 69 in which the plunger is normally seated, while mounted on the opposite end of plunger 67 is a disk 70, received within an opening 7l in handle 28. Lock case 42 is provided with a plurality of radially projecting ribs or lugs 72, which are received Within and seated at the bottom of openings 73 in handle 28.

lVhen it is desired to separate the parts of the handle to dismount the cylinder lock mechanism, therefrom, the operation of my improved form of separable handle lock is as follows: Key 73 is inserted in key opening 39 into the position shown in Fig. 3 of the drawings, in which the shoulders 74 of key 73 are spaced a substantial distance from the outer face of the key plug. In this position, the notches 75 on bit 7 6 of key 73 bring the shears Vor breaks in the pin tumblers into alignment with the outer surface ofthe key plug, whereupon the key plug may be rotated in the position indicated in dotted lines in Fig. l. The key may now be fully inserted into the key plug, as shown in Fig. 5, bringing the end of the bit 76 into contact with the disk 70, withdrawing the plunger 67 from the opening 69 in face plate 64 and permitting the latter to be rotated to bring the threads thereon opposite the interrupted portions in the threads 65, whereupon the face plate and lock mechanism may be withdrawn in an axial direction from the handle 28. l A lock mechanism l having a diiferent arrangement of Y tumblers thereinmay be placed in the handle 28, or such other changes may be made as necessitated the dismounting of the lock, whereupon the face plate 64 may be assembled on the handle 28, and rotated into position wherein the plunger 67 enters the opening 69 in face plate 64, thus locking the face plate and cylinder lock mechanism in handle 28 against displacement, except in the manner previously described.

From the foregoing description of the nature of my invention and its mode of operation, it will be readily understood that I have provided a relatively simple detachable lock in which but a single set of pin tumbler shears or the like is necessary, and in which vthe lock mechanism actuated by the usual key is separate from and independent of the sec- 5 ondary locking means which holds the cylinin the drawings, it will be seen that the sece ondary locking mechanism is carried within the handle or door knob as an entirety, and thus there are not only no exposed parts which may be tam ered with, but the handle or knob presents the outward appearance of the usual door knob. v

While I have shown a preferred embodiment of my invention, it is to be understood that the same is not to be limited to all the details shown but is capable of modification and variation within the spirit of the invention and the scope of the appended claims.

What I claim is:

l. In a lock, a case, a tumbler mechanism mounted in said case, a cover for the lock case separable from the tumbler mechanism, said cover securing the tumbler mechanism in the case, and means normally locking the cover to the case, said means including a part engageable by a key inserted into the lock to be moved in cover unlocking position.

2. In a lock, a case, a tumbler lock mechanism mounted in said case, a cover for the lock case, said cover being .removable to permit access to the tumbler mechanism, and means normally locking said cover against movement relatively to the case, said means including a part separate from the tumbler lock mechanism and engageable by a key inserted into the lock to move said cover locking means into unlocked position.

8. A lock having a bolt, a plural part case and a plurality of independent locking devices to control the bolt and the release of the case parts, one of said locking devices being releasable in one position of insertion of a key and the other of said devices being releasable in a plurality of positions of insertion of the key.

4. In a lock, a case. a tumbler mechanism in said case, said mechanism being adapted to be actuated by a key inserted therein, means for securing the tumbler mechanism in the case, said means being normally held against movement relatively to the case, and

vmeans for releasing said securing means upon a longitudinal movement of the key rela'- tively to the tumbler mechanism after the tumblers are set in releasing position.

5. In a lock, a case. a tumbler mechanism in said case, said mechanism beine; adapted to be actuated by a key inserted therein, detachable means for securing the tumbler mechanism in the case. said means being normally securedagainst detachment from the Y A case, and means for releasing said detachable means upon a longitudinal movement ot a key in the tumbler mechanism relatively to the tumblers While the latter are in releasing position.

6. In a lock, a case, a detachable lock mechanism in said case having a key slot, means normally locking said mechanism against detachment from t ie case, said means includ.- ing means engageable by the end of a key inserted into said slot to bring said locking means into releasing position.

7. n combination, a lock provided with tumblers and a key to align the same, said key and tumblers being arranged to permit longitudinal movement of the key in the lock, While the tumblers are held in the same position of alignmentJ by the key and separate locking devices operable by the key in different longitudinal positions.

8. In a lock, a case, a locking mechanism in said case, a cover for said case separate from the locking mechanism adapted to secure said mechanism in the case, means for locking said cover to the case, said means being releasable by a key inserted into the lock mechanism.

9. In a door lock, a door knob, a lock mechanism mounted in said knob, said knob including an inner portion mounted on the door and an outer detachable portion removable to permit access to said lock mechanism, means for locking said detachable portion to the knob, said means being releasable by a key inserted into the lock mechanism.

10. In a door lock, a door knob, a lock mechanism mounted in said knob, said knob including a detachable portion normally securing said lock mechanism in the knob, said portion being provided with a threaded part received within a threaded opening in the knob, means for holding said threaded part against rotation in the threaded opening in the knob, said holding means being releasable by a key inserted into the lock mechanism.

11. In a lock, a case, a locking mechanism in said case, a cover for said case adapted to secure said mechanism in the case, a plunger normally engaging said cover and securing it against movement relative to the case, said plunger being engageable by a key inserted into the locking mechanism to be disengaged *from said cover.

l2. lin a door lock, a door handle, said handle beine made u out of a lurality of a P P parts, a tumbler mechanism mounted between said parte, means for securing said parts together, and means on said tumbler mechanism engaging said parts to prevent relative movement therebetween, the means on said tumbler mechanism engaging one of said parts being releasable by a key inserted into the tumbler mechanism.

13.. lin a door lock, a door handle, said handle being made up out of a plurality o" negar/oe parts, one of said parts being provided with a threaded portion received in a threaded opening in the other of said parts, a tumbler mechanism mounted between said parts, -and means on said tumbler mechanism engaging both o said parts and preventing relative movement therebetween, the means engaging one of said parts being releasable by a key inserted into the tumbler mechanism.

14. ln a door lock, a door handle, said handle being made up out of a plurality of parts, one of said parts being provided with a threaded portion received in a threaded opening in the other of said parts, a tumbler mechanism mounted between said parts, and means on said tumbler mechanism engaging both of said parts and preventing relative movement therebetween, said means includg a plunger engaging one of said parts, said plunger being arranged to be engaged by a key inserted into the tumbler mechanism and disengaged Jom said one part.

l5. In a lock` a lock casing, said casing including two parts, a lock mechanism mounted between said parts but detachable from both thereof, means on said lock mechanism engaging both of the casing parts to prevent relative movement therebetween, the means engaging one of said parts being releasable by a key inserted into the lock mechanism.

lG. In a lock, a lock case, said case including a body portion with a cover therefor, said cover being provided with a threaded portion received in a threaded opening in the main body portion, a lock mechanism mounted between the cover and main body portion, and means on said locking mechanism to prevent the cover from being unscrewed from the threaded opening in the main body portion, said means being releasable by a key inserted into the lock mechanism.

l?. n a lock, a lock case, a cover therefor., said cover being provided with a threaded portion received in a threaded openin in the case, a lock mechanism mounted in tie lock case, a plunger in the lock mechanism, said plunger engaging the cover and preventing the latter f 'om being unscrevved from the threaded opening in the case, said plunger being engageable by a key inserted into the lock mechanism to be released from engage" ment with the cover.

18. in a door iock, a hoilow door handie, a. tumbler mechanism mounted in said handle, a face plate on said handle securing said tumbler mechanism therein, said 'iace plate being provided 'with a threaded portion received in a threaded opening in the handle, a plunger in said. tumbler mechanism engaging said face plate and preventing the latter from being uns/crewed from the handle, said plunger being arranged to be en'raged by a key inserted into the tumbler mec anism and to be disengaged from the face plate.

19. 'in a. door Flock, hollow door handie, a

face plate for said handle, a tumbler mechanism mounted in said handle and secured in place by the face plate, said face plate being provided with a threaded portion engaging a threaded opening in the door handle, a

the key inserted into the tumbler mechanism to disengage said plunger from the face plate. 20. In a door lock, a hollow door handle, a face plate for said handle, a tumbler mechanism mounted in said handle and secured in place by the face plate, said face plate being provided with a threaded portion engaging a threaded opening in the door handle, a plunger mounted Within the handle, a spring normally urging said plunger into contact with the fa'ce plate, said face plate being rovided With an opening in which the end the plunger is received, and means on said plunger which may be engaged by the end of the key inserted into the tumbler mechanism to disengage said plunger from the'face plate, said means comprising a disk securedon the plunger at the opposite end thereof from the face plate. 21. In a door' lock, a hollow door handle, a face plate for the same, said face plate bein provided with a threaded portion receive within a threaded opening in the door handle, the threads on the face plate 'and in the threaded vopening being interrupted, a lock mechanism mounted in the door handle and secured in place by 4the face plate, a plunger mounted within the door handle, a spring normally urging said plunger into contact with the face plate, said face plate being provided with an opening in which the plunger is received, and means on said plunger which may be engaged by a key inserted into the lock mechanisml to disengage said plunger from the face plate. h

22. In a door lock, a hollow door handle, a face plate, said face plate being provided with I a threaded portion received within a threaded openin in the door handle, the threads on said threa ed portion and in said opening be ing interrupted, a lock mechanism mounted in the door handle and secured therein by the face plate, said lock mechanism being provided with means engaging the door handle to prevent relative movement therebetween, a plunger mounted in said lock mechanism, a spring normally urging said plunger into contact with the face plate, said face plate being provided with an opening in which said plunger may be received, and means on said plunger which may be engaged by a key inserted into the lock mechanism to disengage said plunger from the face plate.

23. In a lock, a case having an opening,

lock mechanism mounted in the case and insertable therein through said opening, a cover for the opening permitting access to the lock mechanism, and key operated means to lock the cover to the case, said lock mechanism being detachable from both cover and case.

124. A lock having a bolt, a case associated with said lock and having an opening, a cover for said case, means for securin said cover to the case and key operated loc ing mechanism within the case, said mechanism being insertable through said opening and selectively operative to retract the bolt and release said cover, said lock mechanism being detachable from both cover and case. Y

25. In a door lock, a plural part casing, a

lock mechanism within said casing, one of the parts of said casing being detachable to permit access to said lock mechanism, means to secure the two parts of the casing together, one of said casing parts being rotatable to bring said means into operative and inoperative positions, and being controlled in its rotation by the locking mechanism.

26. A 1plural part door knob, having housed therein ocking mechanism, said mechanism being accessible for removal when one part of the knob is detached, and means for securing the parts' of the knob together, and said lockmg mechanism being operable to release said knob parts for detachment.

27. A therein locking mechanism constructed independently of said knob parts and accessible for removal when one part of the knob is detached, means for securing said knob parts together, said means being releasable upon operation of the locking mechanism by a key.

lplural part knob having housed 28. In a lock mechanism for a door, a two 30. In a cylinder lock, a casing, a core in said casing, said casing being separable into parts to permit the detachment of the core from the casing, and key controlled means for controlling the separation of the parts.

31. In a cylinderlock, a casing, a core in said casing, means at one end of said casing to hold the core detachably in the casing, and means at the other end of the casing operable by a key inserted in said core to detachably secure said first named means to the casing.

32. In a cylinder lock, a casing, a pin tumbler locking mechanism in said casing, the pin tumblers of said mechanism being vprovided with a single set of breaks, and means operable by a key inserted in said pin tumbler mechanism for releasably retaining said mechanism within the casing.

33. In a cylinder lock, a housin a core insertable in said housing from the ront end thereof, said core including key operated tumblers adapted to be brought into identical positions of adjustment by a key in either' of two Eositions of longitudinal adjustment of the ey relatively to the tumbleis and 10 means operated by the key in one oi said positions to release the core for removal from the housing, said means being freed from o ration by the key in the other position of a. 'ustment of the latter. y Witness whereof, I have hereunto set my hand this 9 day of May, 1928.

JOHN H. SHAW. 

